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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Abstract layer for MIDI v1.0 stream | |
c1017a4c | 3 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
1da177e4 LT |
4 | * |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | * | |
20 | */ | |
21 | ||
1da177e4 LT |
22 | #include <sound/core.h> |
23 | #include <linux/major.h> | |
24 | #include <linux/init.h> | |
1da177e4 LT |
25 | #include <linux/sched.h> |
26 | #include <linux/slab.h> | |
27 | #include <linux/time.h> | |
28 | #include <linux/wait.h> | |
1a60d4c5 | 29 | #include <linux/mutex.h> |
1da177e4 LT |
30 | #include <linux/moduleparam.h> |
31 | #include <linux/delay.h> | |
1da177e4 LT |
32 | #include <sound/rawmidi.h> |
33 | #include <sound/info.h> | |
34 | #include <sound/control.h> | |
35 | #include <sound/minors.h> | |
36 | #include <sound/initval.h> | |
37 | ||
c1017a4c | 38 | MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>"); |
1da177e4 LT |
39 | MODULE_DESCRIPTION("Midlevel RawMidi code for ALSA."); |
40 | MODULE_LICENSE("GPL"); | |
41 | ||
42 | #ifdef CONFIG_SND_OSSEMUL | |
6581f4e7 | 43 | static int midi_map[SNDRV_CARDS]; |
1da177e4 LT |
44 | static int amidi_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1}; |
45 | module_param_array(midi_map, int, NULL, 0444); | |
46 | MODULE_PARM_DESC(midi_map, "Raw MIDI device number assigned to 1st OSS device."); | |
47 | module_param_array(amidi_map, int, NULL, 0444); | |
48 | MODULE_PARM_DESC(amidi_map, "Raw MIDI device number assigned to 2nd OSS device."); | |
49 | #endif /* CONFIG_SND_OSSEMUL */ | |
50 | ||
48c9d417 TI |
51 | static int snd_rawmidi_free(struct snd_rawmidi *rawmidi); |
52 | static int snd_rawmidi_dev_free(struct snd_device *device); | |
53 | static int snd_rawmidi_dev_register(struct snd_device *device); | |
54 | static int snd_rawmidi_dev_disconnect(struct snd_device *device); | |
1da177e4 | 55 | |
f87135f5 | 56 | static LIST_HEAD(snd_rawmidi_devices); |
1a60d4c5 | 57 | static DEFINE_MUTEX(register_mutex); |
1da177e4 | 58 | |
f87135f5 CL |
59 | static struct snd_rawmidi *snd_rawmidi_search(struct snd_card *card, int device) |
60 | { | |
f87135f5 CL |
61 | struct snd_rawmidi *rawmidi; |
62 | ||
9244b2c3 | 63 | list_for_each_entry(rawmidi, &snd_rawmidi_devices, list) |
f87135f5 CL |
64 | if (rawmidi->card == card && rawmidi->device == device) |
65 | return rawmidi; | |
f87135f5 CL |
66 | return NULL; |
67 | } | |
68 | ||
1da177e4 LT |
69 | static inline unsigned short snd_rawmidi_file_flags(struct file *file) |
70 | { | |
71 | switch (file->f_mode & (FMODE_READ | FMODE_WRITE)) { | |
72 | case FMODE_WRITE: | |
73 | return SNDRV_RAWMIDI_LFLG_OUTPUT; | |
74 | case FMODE_READ: | |
75 | return SNDRV_RAWMIDI_LFLG_INPUT; | |
76 | default: | |
77 | return SNDRV_RAWMIDI_LFLG_OPEN; | |
78 | } | |
79 | } | |
80 | ||
48c9d417 | 81 | static inline int snd_rawmidi_ready(struct snd_rawmidi_substream *substream) |
1da177e4 | 82 | { |
48c9d417 | 83 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
84 | return runtime->avail >= runtime->avail_min; |
85 | } | |
86 | ||
48c9d417 TI |
87 | static inline int snd_rawmidi_ready_append(struct snd_rawmidi_substream *substream, |
88 | size_t count) | |
1da177e4 | 89 | { |
48c9d417 | 90 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
91 | return runtime->avail >= runtime->avail_min && |
92 | (!substream->append || runtime->avail >= count); | |
93 | } | |
94 | ||
95 | static void snd_rawmidi_input_event_tasklet(unsigned long data) | |
96 | { | |
48c9d417 | 97 | struct snd_rawmidi_substream *substream = (struct snd_rawmidi_substream *)data; |
1da177e4 LT |
98 | substream->runtime->event(substream); |
99 | } | |
100 | ||
101 | static void snd_rawmidi_output_trigger_tasklet(unsigned long data) | |
102 | { | |
48c9d417 | 103 | struct snd_rawmidi_substream *substream = (struct snd_rawmidi_substream *)data; |
1da177e4 LT |
104 | substream->ops->trigger(substream, 1); |
105 | } | |
106 | ||
48c9d417 | 107 | static int snd_rawmidi_runtime_create(struct snd_rawmidi_substream *substream) |
1da177e4 | 108 | { |
48c9d417 | 109 | struct snd_rawmidi_runtime *runtime; |
1da177e4 | 110 | |
ca2c0966 | 111 | if ((runtime = kzalloc(sizeof(*runtime), GFP_KERNEL)) == NULL) |
1da177e4 LT |
112 | return -ENOMEM; |
113 | spin_lock_init(&runtime->lock); | |
114 | init_waitqueue_head(&runtime->sleep); | |
115 | if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT) | |
116 | tasklet_init(&runtime->tasklet, | |
117 | snd_rawmidi_input_event_tasklet, | |
118 | (unsigned long)substream); | |
119 | else | |
120 | tasklet_init(&runtime->tasklet, | |
121 | snd_rawmidi_output_trigger_tasklet, | |
122 | (unsigned long)substream); | |
123 | runtime->event = NULL; | |
124 | runtime->buffer_size = PAGE_SIZE; | |
125 | runtime->avail_min = 1; | |
126 | if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT) | |
127 | runtime->avail = 0; | |
128 | else | |
129 | runtime->avail = runtime->buffer_size; | |
130 | if ((runtime->buffer = kmalloc(runtime->buffer_size, GFP_KERNEL)) == NULL) { | |
131 | kfree(runtime); | |
132 | return -ENOMEM; | |
133 | } | |
134 | runtime->appl_ptr = runtime->hw_ptr = 0; | |
135 | substream->runtime = runtime; | |
136 | return 0; | |
137 | } | |
138 | ||
48c9d417 | 139 | static int snd_rawmidi_runtime_free(struct snd_rawmidi_substream *substream) |
1da177e4 | 140 | { |
48c9d417 | 141 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
142 | |
143 | kfree(runtime->buffer); | |
144 | kfree(runtime); | |
145 | substream->runtime = NULL; | |
146 | return 0; | |
147 | } | |
148 | ||
48c9d417 | 149 | static inline void snd_rawmidi_output_trigger(struct snd_rawmidi_substream *substream,int up) |
1da177e4 | 150 | { |
219df32f TI |
151 | if (!substream->opened) |
152 | return; | |
1da177e4 | 153 | if (up) { |
1f04128a | 154 | tasklet_schedule(&substream->runtime->tasklet); |
1da177e4 LT |
155 | } else { |
156 | tasklet_kill(&substream->runtime->tasklet); | |
157 | substream->ops->trigger(substream, 0); | |
158 | } | |
159 | } | |
160 | ||
48c9d417 | 161 | static void snd_rawmidi_input_trigger(struct snd_rawmidi_substream *substream, int up) |
1da177e4 | 162 | { |
219df32f TI |
163 | if (!substream->opened) |
164 | return; | |
1da177e4 LT |
165 | substream->ops->trigger(substream, up); |
166 | if (!up && substream->runtime->event) | |
167 | tasklet_kill(&substream->runtime->tasklet); | |
168 | } | |
169 | ||
48c9d417 | 170 | int snd_rawmidi_drop_output(struct snd_rawmidi_substream *substream) |
1da177e4 LT |
171 | { |
172 | unsigned long flags; | |
48c9d417 | 173 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
174 | |
175 | snd_rawmidi_output_trigger(substream, 0); | |
176 | runtime->drain = 0; | |
177 | spin_lock_irqsave(&runtime->lock, flags); | |
178 | runtime->appl_ptr = runtime->hw_ptr = 0; | |
179 | runtime->avail = runtime->buffer_size; | |
180 | spin_unlock_irqrestore(&runtime->lock, flags); | |
181 | return 0; | |
182 | } | |
183 | ||
48c9d417 | 184 | int snd_rawmidi_drain_output(struct snd_rawmidi_substream *substream) |
1da177e4 LT |
185 | { |
186 | int err; | |
187 | long timeout; | |
48c9d417 | 188 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
189 | |
190 | err = 0; | |
191 | runtime->drain = 1; | |
192 | timeout = wait_event_interruptible_timeout(runtime->sleep, | |
193 | (runtime->avail >= runtime->buffer_size), | |
194 | 10*HZ); | |
195 | if (signal_pending(current)) | |
196 | err = -ERESTARTSYS; | |
197 | if (runtime->avail < runtime->buffer_size && !timeout) { | |
198 | snd_printk(KERN_WARNING "rawmidi drain error (avail = %li, buffer_size = %li)\n", (long)runtime->avail, (long)runtime->buffer_size); | |
199 | err = -EIO; | |
200 | } | |
201 | runtime->drain = 0; | |
202 | if (err != -ERESTARTSYS) { | |
203 | /* we need wait a while to make sure that Tx FIFOs are empty */ | |
204 | if (substream->ops->drain) | |
205 | substream->ops->drain(substream); | |
206 | else | |
207 | msleep(50); | |
208 | snd_rawmidi_drop_output(substream); | |
209 | } | |
210 | return err; | |
211 | } | |
212 | ||
48c9d417 | 213 | int snd_rawmidi_drain_input(struct snd_rawmidi_substream *substream) |
1da177e4 LT |
214 | { |
215 | unsigned long flags; | |
48c9d417 | 216 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
217 | |
218 | snd_rawmidi_input_trigger(substream, 0); | |
219 | runtime->drain = 0; | |
220 | spin_lock_irqsave(&runtime->lock, flags); | |
221 | runtime->appl_ptr = runtime->hw_ptr = 0; | |
222 | runtime->avail = 0; | |
223 | spin_unlock_irqrestore(&runtime->lock, flags); | |
224 | return 0; | |
225 | } | |
226 | ||
9a1b64ca TI |
227 | /* look for an available substream for the given stream direction; |
228 | * if a specific subdevice is given, try to assign it | |
229 | */ | |
230 | static int assign_substream(struct snd_rawmidi *rmidi, int subdevice, | |
231 | int stream, int mode, | |
232 | struct snd_rawmidi_substream **sub_ret) | |
1da177e4 | 233 | { |
9a1b64ca TI |
234 | struct snd_rawmidi_substream *substream; |
235 | struct snd_rawmidi_str *s = &rmidi->streams[stream]; | |
236 | static unsigned int info_flags[2] = { | |
237 | [SNDRV_RAWMIDI_STREAM_OUTPUT] = SNDRV_RAWMIDI_INFO_OUTPUT, | |
238 | [SNDRV_RAWMIDI_STREAM_INPUT] = SNDRV_RAWMIDI_INFO_INPUT, | |
239 | }; | |
1da177e4 | 240 | |
9a1b64ca | 241 | if (!(rmidi->info_flags & info_flags[stream])) |
f9d20283 | 242 | return -ENXIO; |
9a1b64ca TI |
243 | if (subdevice >= 0 && subdevice >= s->substream_count) |
244 | return -ENODEV; | |
9a1b64ca TI |
245 | |
246 | list_for_each_entry(substream, &s->substreams, list) { | |
247 | if (substream->opened) { | |
248 | if (stream == SNDRV_RAWMIDI_STREAM_INPUT || | |
16fb1096 CL |
249 | !(mode & SNDRV_RAWMIDI_LFLG_APPEND) || |
250 | !substream->append) | |
9a1b64ca TI |
251 | continue; |
252 | } | |
253 | if (subdevice < 0 || subdevice == substream->number) { | |
254 | *sub_ret = substream; | |
255 | return 0; | |
256 | } | |
1da177e4 | 257 | } |
9a1b64ca TI |
258 | return -EAGAIN; |
259 | } | |
f9d20283 | 260 | |
9a1b64ca TI |
261 | /* open and do ref-counting for the given substream */ |
262 | static int open_substream(struct snd_rawmidi *rmidi, | |
263 | struct snd_rawmidi_substream *substream, | |
264 | int mode) | |
265 | { | |
266 | int err; | |
267 | ||
8579d2d7 CL |
268 | if (substream->use_count == 0) { |
269 | err = snd_rawmidi_runtime_create(substream); | |
270 | if (err < 0) | |
271 | return err; | |
272 | err = substream->ops->open(substream); | |
b7fe750f CL |
273 | if (err < 0) { |
274 | snd_rawmidi_runtime_free(substream); | |
8579d2d7 | 275 | return err; |
b7fe750f | 276 | } |
8579d2d7 | 277 | substream->opened = 1; |
2d4b8420 | 278 | substream->active_sensing = 0; |
8579d2d7 CL |
279 | if (mode & SNDRV_RAWMIDI_LFLG_APPEND) |
280 | substream->append = 1; | |
7584af10 | 281 | substream->pid = get_pid(task_pid(current)); |
91d12c48 | 282 | rmidi->streams[substream->stream].substream_opened++; |
8579d2d7 CL |
283 | } |
284 | substream->use_count++; | |
9a1b64ca TI |
285 | return 0; |
286 | } | |
287 | ||
288 | static void close_substream(struct snd_rawmidi *rmidi, | |
289 | struct snd_rawmidi_substream *substream, | |
290 | int cleanup); | |
291 | ||
292 | static int rawmidi_open_priv(struct snd_rawmidi *rmidi, int subdevice, int mode, | |
293 | struct snd_rawmidi_file *rfile) | |
294 | { | |
295 | struct snd_rawmidi_substream *sinput = NULL, *soutput = NULL; | |
296 | int err; | |
297 | ||
298 | rfile->input = rfile->output = NULL; | |
1da177e4 | 299 | if (mode & SNDRV_RAWMIDI_LFLG_INPUT) { |
9a1b64ca TI |
300 | err = assign_substream(rmidi, subdevice, |
301 | SNDRV_RAWMIDI_STREAM_INPUT, | |
302 | mode, &sinput); | |
303 | if (err < 0) | |
b7fe750f | 304 | return err; |
1da177e4 LT |
305 | } |
306 | if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) { | |
9a1b64ca TI |
307 | err = assign_substream(rmidi, subdevice, |
308 | SNDRV_RAWMIDI_STREAM_OUTPUT, | |
309 | mode, &soutput); | |
310 | if (err < 0) | |
b7fe750f | 311 | return err; |
1da177e4 | 312 | } |
9a1b64ca TI |
313 | |
314 | if (sinput) { | |
315 | err = open_substream(rmidi, sinput, mode); | |
316 | if (err < 0) | |
b7fe750f | 317 | return err; |
1da177e4 | 318 | } |
9a1b64ca TI |
319 | if (soutput) { |
320 | err = open_substream(rmidi, soutput, mode); | |
321 | if (err < 0) { | |
322 | if (sinput) | |
323 | close_substream(rmidi, sinput, 0); | |
b7fe750f | 324 | return err; |
1da177e4 | 325 | } |
1da177e4 | 326 | } |
9a1b64ca TI |
327 | |
328 | rfile->rmidi = rmidi; | |
329 | rfile->input = sinput; | |
330 | rfile->output = soutput; | |
1da177e4 | 331 | return 0; |
9a1b64ca TI |
332 | } |
333 | ||
334 | /* called from sound/core/seq/seq_midi.c */ | |
335 | int snd_rawmidi_kernel_open(struct snd_card *card, int device, int subdevice, | |
336 | int mode, struct snd_rawmidi_file * rfile) | |
337 | { | |
338 | struct snd_rawmidi *rmidi; | |
339 | int err; | |
340 | ||
341 | if (snd_BUG_ON(!rfile)) | |
342 | return -EINVAL; | |
343 | ||
344 | mutex_lock(®ister_mutex); | |
345 | rmidi = snd_rawmidi_search(card, device); | |
346 | if (rmidi == NULL) { | |
347 | mutex_unlock(®ister_mutex); | |
348 | return -ENODEV; | |
349 | } | |
350 | if (!try_module_get(rmidi->card->module)) { | |
351 | mutex_unlock(®ister_mutex); | |
352 | return -ENXIO; | |
353 | } | |
354 | mutex_unlock(®ister_mutex); | |
355 | ||
356 | mutex_lock(&rmidi->open_mutex); | |
357 | err = rawmidi_open_priv(rmidi, subdevice, mode, rfile); | |
358 | mutex_unlock(&rmidi->open_mutex); | |
359 | if (err < 0) | |
360 | module_put(rmidi->card->module); | |
1da177e4 LT |
361 | return err; |
362 | } | |
363 | ||
364 | static int snd_rawmidi_open(struct inode *inode, struct file *file) | |
365 | { | |
366 | int maj = imajor(inode); | |
48c9d417 | 367 | struct snd_card *card; |
f87135f5 | 368 | int subdevice; |
1da177e4 LT |
369 | unsigned short fflags; |
370 | int err; | |
48c9d417 | 371 | struct snd_rawmidi *rmidi; |
9a1b64ca | 372 | struct snd_rawmidi_file *rawmidi_file = NULL; |
1da177e4 | 373 | wait_queue_t wait; |
48c9d417 | 374 | struct snd_ctl_file *kctl; |
1da177e4 | 375 | |
9a1b64ca TI |
376 | if ((file->f_flags & O_APPEND) && !(file->f_flags & O_NONBLOCK)) |
377 | return -EINVAL; /* invalid combination */ | |
378 | ||
02f4865f TI |
379 | err = nonseekable_open(inode, file); |
380 | if (err < 0) | |
381 | return err; | |
382 | ||
f1902860 | 383 | if (maj == snd_major) { |
f87135f5 CL |
384 | rmidi = snd_lookup_minor_data(iminor(inode), |
385 | SNDRV_DEVICE_TYPE_RAWMIDI); | |
1da177e4 | 386 | #ifdef CONFIG_SND_OSSEMUL |
f1902860 | 387 | } else if (maj == SOUND_MAJOR) { |
f87135f5 CL |
388 | rmidi = snd_lookup_oss_minor_data(iminor(inode), |
389 | SNDRV_OSS_DEVICE_TYPE_MIDI); | |
1da177e4 | 390 | #endif |
f1902860 | 391 | } else |
1da177e4 | 392 | return -ENXIO; |
1da177e4 | 393 | |
1da177e4 LT |
394 | if (rmidi == NULL) |
395 | return -ENODEV; | |
9a1b64ca TI |
396 | |
397 | if (!try_module_get(rmidi->card->module)) | |
398 | return -ENXIO; | |
399 | ||
400 | mutex_lock(&rmidi->open_mutex); | |
1da177e4 LT |
401 | card = rmidi->card; |
402 | err = snd_card_file_add(card, file); | |
403 | if (err < 0) | |
9a1b64ca | 404 | goto __error_card; |
1da177e4 | 405 | fflags = snd_rawmidi_file_flags(file); |
f1902860 | 406 | if ((file->f_flags & O_APPEND) || maj == SOUND_MAJOR) /* OSS emul? */ |
1da177e4 | 407 | fflags |= SNDRV_RAWMIDI_LFLG_APPEND; |
1da177e4 LT |
408 | rawmidi_file = kmalloc(sizeof(*rawmidi_file), GFP_KERNEL); |
409 | if (rawmidi_file == NULL) { | |
9a1b64ca TI |
410 | err = -ENOMEM; |
411 | goto __error; | |
1da177e4 LT |
412 | } |
413 | init_waitqueue_entry(&wait, current); | |
414 | add_wait_queue(&rmidi->open_wait, &wait); | |
1da177e4 LT |
415 | while (1) { |
416 | subdevice = -1; | |
399ccdc1 | 417 | read_lock(&card->ctl_files_rwlock); |
9244b2c3 | 418 | list_for_each_entry(kctl, &card->ctl_files, list) { |
25d27ede | 419 | if (kctl->pid == task_pid(current)) { |
1da177e4 | 420 | subdevice = kctl->prefer_rawmidi_subdevice; |
2529bba7 TI |
421 | if (subdevice != -1) |
422 | break; | |
1da177e4 LT |
423 | } |
424 | } | |
399ccdc1 | 425 | read_unlock(&card->ctl_files_rwlock); |
9a1b64ca | 426 | err = rawmidi_open_priv(rmidi, subdevice, fflags, rawmidi_file); |
1da177e4 LT |
427 | if (err >= 0) |
428 | break; | |
429 | if (err == -EAGAIN) { | |
430 | if (file->f_flags & O_NONBLOCK) { | |
431 | err = -EBUSY; | |
432 | break; | |
433 | } | |
434 | } else | |
435 | break; | |
436 | set_current_state(TASK_INTERRUPTIBLE); | |
1a60d4c5 | 437 | mutex_unlock(&rmidi->open_mutex); |
1da177e4 | 438 | schedule(); |
1a60d4c5 | 439 | mutex_lock(&rmidi->open_mutex); |
1da177e4 LT |
440 | if (signal_pending(current)) { |
441 | err = -ERESTARTSYS; | |
442 | break; | |
443 | } | |
444 | } | |
9a1b64ca TI |
445 | remove_wait_queue(&rmidi->open_wait, &wait); |
446 | if (err < 0) { | |
447 | kfree(rawmidi_file); | |
448 | goto __error; | |
449 | } | |
1da177e4 LT |
450 | #ifdef CONFIG_SND_OSSEMUL |
451 | if (rawmidi_file->input && rawmidi_file->input->runtime) | |
452 | rawmidi_file->input->runtime->oss = (maj == SOUND_MAJOR); | |
453 | if (rawmidi_file->output && rawmidi_file->output->runtime) | |
454 | rawmidi_file->output->runtime->oss = (maj == SOUND_MAJOR); | |
455 | #endif | |
9a1b64ca TI |
456 | file->private_data = rawmidi_file; |
457 | mutex_unlock(&rmidi->open_mutex); | |
458 | return 0; | |
459 | ||
460 | __error: | |
461 | snd_card_file_remove(card, file); | |
462 | __error_card: | |
1a60d4c5 | 463 | mutex_unlock(&rmidi->open_mutex); |
9a1b64ca | 464 | module_put(rmidi->card->module); |
1da177e4 LT |
465 | return err; |
466 | } | |
467 | ||
9a1b64ca TI |
468 | static void close_substream(struct snd_rawmidi *rmidi, |
469 | struct snd_rawmidi_substream *substream, | |
470 | int cleanup) | |
1da177e4 | 471 | { |
9a1b64ca TI |
472 | if (--substream->use_count) |
473 | return; | |
1da177e4 | 474 | |
9a1b64ca TI |
475 | if (cleanup) { |
476 | if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT) | |
477 | snd_rawmidi_input_trigger(substream, 0); | |
478 | else { | |
1da177e4 LT |
479 | if (substream->active_sensing) { |
480 | unsigned char buf = 0xfe; | |
9a1b64ca TI |
481 | /* sending single active sensing message |
482 | * to shut the device up | |
483 | */ | |
1da177e4 LT |
484 | snd_rawmidi_kernel_write(substream, &buf, 1); |
485 | } | |
486 | if (snd_rawmidi_drain_output(substream) == -ERESTARTSYS) | |
487 | snd_rawmidi_output_trigger(substream, 0); | |
1da177e4 | 488 | } |
1da177e4 | 489 | } |
9a1b64ca TI |
490 | substream->ops->close(substream); |
491 | if (substream->runtime->private_free) | |
492 | substream->runtime->private_free(substream); | |
493 | snd_rawmidi_runtime_free(substream); | |
494 | substream->opened = 0; | |
495 | substream->append = 0; | |
7584af10 CL |
496 | put_pid(substream->pid); |
497 | substream->pid = NULL; | |
91d12c48 | 498 | rmidi->streams[substream->stream].substream_opened--; |
9a1b64ca TI |
499 | } |
500 | ||
501 | static void rawmidi_release_priv(struct snd_rawmidi_file *rfile) | |
502 | { | |
503 | struct snd_rawmidi *rmidi; | |
504 | ||
505 | rmidi = rfile->rmidi; | |
506 | mutex_lock(&rmidi->open_mutex); | |
507 | if (rfile->input) { | |
508 | close_substream(rmidi, rfile->input, 1); | |
509 | rfile->input = NULL; | |
510 | } | |
511 | if (rfile->output) { | |
512 | close_substream(rmidi, rfile->output, 1); | |
513 | rfile->output = NULL; | |
514 | } | |
515 | rfile->rmidi = NULL; | |
1a60d4c5 | 516 | mutex_unlock(&rmidi->open_mutex); |
9a1b64ca TI |
517 | wake_up(&rmidi->open_wait); |
518 | } | |
519 | ||
520 | /* called from sound/core/seq/seq_midi.c */ | |
521 | int snd_rawmidi_kernel_release(struct snd_rawmidi_file *rfile) | |
522 | { | |
523 | struct snd_rawmidi *rmidi; | |
524 | ||
525 | if (snd_BUG_ON(!rfile)) | |
526 | return -ENXIO; | |
527 | ||
528 | rmidi = rfile->rmidi; | |
529 | rawmidi_release_priv(rfile); | |
1da177e4 LT |
530 | module_put(rmidi->card->module); |
531 | return 0; | |
532 | } | |
533 | ||
534 | static int snd_rawmidi_release(struct inode *inode, struct file *file) | |
535 | { | |
48c9d417 TI |
536 | struct snd_rawmidi_file *rfile; |
537 | struct snd_rawmidi *rmidi; | |
aa73aec6 | 538 | struct module *module; |
1da177e4 LT |
539 | |
540 | rfile = file->private_data; | |
1da177e4 | 541 | rmidi = rfile->rmidi; |
9a1b64ca | 542 | rawmidi_release_priv(rfile); |
1da177e4 | 543 | kfree(rfile); |
aa73aec6 | 544 | module = rmidi->card->module; |
1da177e4 | 545 | snd_card_file_remove(rmidi->card, file); |
aa73aec6 | 546 | module_put(module); |
9a1b64ca | 547 | return 0; |
1da177e4 LT |
548 | } |
549 | ||
18612048 AB |
550 | static int snd_rawmidi_info(struct snd_rawmidi_substream *substream, |
551 | struct snd_rawmidi_info *info) | |
1da177e4 | 552 | { |
48c9d417 | 553 | struct snd_rawmidi *rmidi; |
1da177e4 LT |
554 | |
555 | if (substream == NULL) | |
556 | return -ENODEV; | |
557 | rmidi = substream->rmidi; | |
558 | memset(info, 0, sizeof(*info)); | |
559 | info->card = rmidi->card->number; | |
560 | info->device = rmidi->device; | |
561 | info->subdevice = substream->number; | |
562 | info->stream = substream->stream; | |
563 | info->flags = rmidi->info_flags; | |
564 | strcpy(info->id, rmidi->id); | |
565 | strcpy(info->name, rmidi->name); | |
566 | strcpy(info->subname, substream->name); | |
567 | info->subdevices_count = substream->pstr->substream_count; | |
568 | info->subdevices_avail = (substream->pstr->substream_count - | |
569 | substream->pstr->substream_opened); | |
570 | return 0; | |
571 | } | |
572 | ||
48c9d417 TI |
573 | static int snd_rawmidi_info_user(struct snd_rawmidi_substream *substream, |
574 | struct snd_rawmidi_info __user * _info) | |
1da177e4 | 575 | { |
48c9d417 | 576 | struct snd_rawmidi_info info; |
1da177e4 LT |
577 | int err; |
578 | if ((err = snd_rawmidi_info(substream, &info)) < 0) | |
579 | return err; | |
48c9d417 | 580 | if (copy_to_user(_info, &info, sizeof(struct snd_rawmidi_info))) |
1da177e4 LT |
581 | return -EFAULT; |
582 | return 0; | |
583 | } | |
584 | ||
48c9d417 | 585 | int snd_rawmidi_info_select(struct snd_card *card, struct snd_rawmidi_info *info) |
1da177e4 | 586 | { |
48c9d417 TI |
587 | struct snd_rawmidi *rmidi; |
588 | struct snd_rawmidi_str *pstr; | |
589 | struct snd_rawmidi_substream *substream; | |
f87135f5 | 590 | |
1a60d4c5 | 591 | mutex_lock(®ister_mutex); |
f87135f5 | 592 | rmidi = snd_rawmidi_search(card, info->device); |
1a60d4c5 | 593 | mutex_unlock(®ister_mutex); |
a106cd3d CL |
594 | if (!rmidi) |
595 | return -ENXIO; | |
1da177e4 LT |
596 | if (info->stream < 0 || info->stream > 1) |
597 | return -EINVAL; | |
598 | pstr = &rmidi->streams[info->stream]; | |
599 | if (pstr->substream_count == 0) | |
600 | return -ENOENT; | |
601 | if (info->subdevice >= pstr->substream_count) | |
602 | return -ENXIO; | |
9244b2c3 | 603 | list_for_each_entry(substream, &pstr->substreams, list) { |
1da177e4 LT |
604 | if ((unsigned int)substream->number == info->subdevice) |
605 | return snd_rawmidi_info(substream, info); | |
606 | } | |
607 | return -ENXIO; | |
608 | } | |
609 | ||
48c9d417 TI |
610 | static int snd_rawmidi_info_select_user(struct snd_card *card, |
611 | struct snd_rawmidi_info __user *_info) | |
1da177e4 LT |
612 | { |
613 | int err; | |
48c9d417 | 614 | struct snd_rawmidi_info info; |
1da177e4 LT |
615 | if (get_user(info.device, &_info->device)) |
616 | return -EFAULT; | |
617 | if (get_user(info.stream, &_info->stream)) | |
618 | return -EFAULT; | |
619 | if (get_user(info.subdevice, &_info->subdevice)) | |
620 | return -EFAULT; | |
621 | if ((err = snd_rawmidi_info_select(card, &info)) < 0) | |
622 | return err; | |
48c9d417 | 623 | if (copy_to_user(_info, &info, sizeof(struct snd_rawmidi_info))) |
1da177e4 LT |
624 | return -EFAULT; |
625 | return 0; | |
626 | } | |
627 | ||
48c9d417 TI |
628 | int snd_rawmidi_output_params(struct snd_rawmidi_substream *substream, |
629 | struct snd_rawmidi_params * params) | |
1da177e4 LT |
630 | { |
631 | char *newbuf; | |
48c9d417 | 632 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
633 | |
634 | if (substream->append && substream->use_count > 1) | |
635 | return -EBUSY; | |
636 | snd_rawmidi_drain_output(substream); | |
637 | if (params->buffer_size < 32 || params->buffer_size > 1024L * 1024L) { | |
638 | return -EINVAL; | |
639 | } | |
640 | if (params->avail_min < 1 || params->avail_min > params->buffer_size) { | |
641 | return -EINVAL; | |
642 | } | |
643 | if (params->buffer_size != runtime->buffer_size) { | |
4fa95ef6 JJ |
644 | newbuf = kmalloc(params->buffer_size, GFP_KERNEL); |
645 | if (!newbuf) | |
1da177e4 LT |
646 | return -ENOMEM; |
647 | kfree(runtime->buffer); | |
648 | runtime->buffer = newbuf; | |
649 | runtime->buffer_size = params->buffer_size; | |
1b98ea47 | 650 | runtime->avail = runtime->buffer_size; |
1da177e4 LT |
651 | } |
652 | runtime->avail_min = params->avail_min; | |
653 | substream->active_sensing = !params->no_active_sensing; | |
654 | return 0; | |
655 | } | |
656 | ||
48c9d417 TI |
657 | int snd_rawmidi_input_params(struct snd_rawmidi_substream *substream, |
658 | struct snd_rawmidi_params * params) | |
1da177e4 LT |
659 | { |
660 | char *newbuf; | |
48c9d417 | 661 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
662 | |
663 | snd_rawmidi_drain_input(substream); | |
664 | if (params->buffer_size < 32 || params->buffer_size > 1024L * 1024L) { | |
665 | return -EINVAL; | |
666 | } | |
667 | if (params->avail_min < 1 || params->avail_min > params->buffer_size) { | |
668 | return -EINVAL; | |
669 | } | |
670 | if (params->buffer_size != runtime->buffer_size) { | |
4fa95ef6 JJ |
671 | newbuf = kmalloc(params->buffer_size, GFP_KERNEL); |
672 | if (!newbuf) | |
1da177e4 LT |
673 | return -ENOMEM; |
674 | kfree(runtime->buffer); | |
675 | runtime->buffer = newbuf; | |
676 | runtime->buffer_size = params->buffer_size; | |
677 | } | |
678 | runtime->avail_min = params->avail_min; | |
679 | return 0; | |
680 | } | |
681 | ||
48c9d417 TI |
682 | static int snd_rawmidi_output_status(struct snd_rawmidi_substream *substream, |
683 | struct snd_rawmidi_status * status) | |
1da177e4 | 684 | { |
48c9d417 | 685 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
686 | |
687 | memset(status, 0, sizeof(*status)); | |
688 | status->stream = SNDRV_RAWMIDI_STREAM_OUTPUT; | |
689 | spin_lock_irq(&runtime->lock); | |
690 | status->avail = runtime->avail; | |
691 | spin_unlock_irq(&runtime->lock); | |
692 | return 0; | |
693 | } | |
694 | ||
48c9d417 TI |
695 | static int snd_rawmidi_input_status(struct snd_rawmidi_substream *substream, |
696 | struct snd_rawmidi_status * status) | |
1da177e4 | 697 | { |
48c9d417 | 698 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
699 | |
700 | memset(status, 0, sizeof(*status)); | |
701 | status->stream = SNDRV_RAWMIDI_STREAM_INPUT; | |
702 | spin_lock_irq(&runtime->lock); | |
703 | status->avail = runtime->avail; | |
704 | status->xruns = runtime->xruns; | |
705 | runtime->xruns = 0; | |
706 | spin_unlock_irq(&runtime->lock); | |
707 | return 0; | |
708 | } | |
709 | ||
710 | static long snd_rawmidi_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
711 | { | |
48c9d417 | 712 | struct snd_rawmidi_file *rfile; |
1da177e4 LT |
713 | void __user *argp = (void __user *)arg; |
714 | ||
715 | rfile = file->private_data; | |
716 | if (((cmd >> 8) & 0xff) != 'W') | |
717 | return -ENOTTY; | |
718 | switch (cmd) { | |
719 | case SNDRV_RAWMIDI_IOCTL_PVERSION: | |
720 | return put_user(SNDRV_RAWMIDI_VERSION, (int __user *)argp) ? -EFAULT : 0; | |
721 | case SNDRV_RAWMIDI_IOCTL_INFO: | |
722 | { | |
48c9d417 TI |
723 | int stream; |
724 | struct snd_rawmidi_info __user *info = argp; | |
1da177e4 LT |
725 | if (get_user(stream, &info->stream)) |
726 | return -EFAULT; | |
727 | switch (stream) { | |
728 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
729 | return snd_rawmidi_info_user(rfile->input, info); | |
730 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
731 | return snd_rawmidi_info_user(rfile->output, info); | |
732 | default: | |
733 | return -EINVAL; | |
734 | } | |
735 | } | |
736 | case SNDRV_RAWMIDI_IOCTL_PARAMS: | |
737 | { | |
48c9d417 TI |
738 | struct snd_rawmidi_params params; |
739 | if (copy_from_user(¶ms, argp, sizeof(struct snd_rawmidi_params))) | |
1da177e4 LT |
740 | return -EFAULT; |
741 | switch (params.stream) { | |
742 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
743 | if (rfile->output == NULL) | |
744 | return -EINVAL; | |
745 | return snd_rawmidi_output_params(rfile->output, ¶ms); | |
746 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
747 | if (rfile->input == NULL) | |
748 | return -EINVAL; | |
749 | return snd_rawmidi_input_params(rfile->input, ¶ms); | |
750 | default: | |
751 | return -EINVAL; | |
752 | } | |
753 | } | |
754 | case SNDRV_RAWMIDI_IOCTL_STATUS: | |
755 | { | |
756 | int err = 0; | |
48c9d417 TI |
757 | struct snd_rawmidi_status status; |
758 | if (copy_from_user(&status, argp, sizeof(struct snd_rawmidi_status))) | |
1da177e4 LT |
759 | return -EFAULT; |
760 | switch (status.stream) { | |
761 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
762 | if (rfile->output == NULL) | |
763 | return -EINVAL; | |
764 | err = snd_rawmidi_output_status(rfile->output, &status); | |
765 | break; | |
766 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
767 | if (rfile->input == NULL) | |
768 | return -EINVAL; | |
769 | err = snd_rawmidi_input_status(rfile->input, &status); | |
770 | break; | |
771 | default: | |
772 | return -EINVAL; | |
773 | } | |
774 | if (err < 0) | |
775 | return err; | |
48c9d417 | 776 | if (copy_to_user(argp, &status, sizeof(struct snd_rawmidi_status))) |
1da177e4 LT |
777 | return -EFAULT; |
778 | return 0; | |
779 | } | |
780 | case SNDRV_RAWMIDI_IOCTL_DROP: | |
781 | { | |
782 | int val; | |
783 | if (get_user(val, (int __user *) argp)) | |
784 | return -EFAULT; | |
785 | switch (val) { | |
786 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
787 | if (rfile->output == NULL) | |
788 | return -EINVAL; | |
789 | return snd_rawmidi_drop_output(rfile->output); | |
790 | default: | |
791 | return -EINVAL; | |
792 | } | |
793 | } | |
794 | case SNDRV_RAWMIDI_IOCTL_DRAIN: | |
795 | { | |
796 | int val; | |
797 | if (get_user(val, (int __user *) argp)) | |
798 | return -EFAULT; | |
799 | switch (val) { | |
800 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
801 | if (rfile->output == NULL) | |
802 | return -EINVAL; | |
803 | return snd_rawmidi_drain_output(rfile->output); | |
804 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
805 | if (rfile->input == NULL) | |
806 | return -EINVAL; | |
807 | return snd_rawmidi_drain_input(rfile->input); | |
808 | default: | |
809 | return -EINVAL; | |
810 | } | |
811 | } | |
812 | #ifdef CONFIG_SND_DEBUG | |
813 | default: | |
814 | snd_printk(KERN_WARNING "rawmidi: unknown command = 0x%x\n", cmd); | |
815 | #endif | |
816 | } | |
817 | return -ENOTTY; | |
818 | } | |
819 | ||
48c9d417 TI |
820 | static int snd_rawmidi_control_ioctl(struct snd_card *card, |
821 | struct snd_ctl_file *control, | |
1da177e4 LT |
822 | unsigned int cmd, |
823 | unsigned long arg) | |
824 | { | |
825 | void __user *argp = (void __user *)arg; | |
1da177e4 | 826 | |
1da177e4 LT |
827 | switch (cmd) { |
828 | case SNDRV_CTL_IOCTL_RAWMIDI_NEXT_DEVICE: | |
829 | { | |
830 | int device; | |
831 | ||
832 | if (get_user(device, (int __user *)argp)) | |
833 | return -EFAULT; | |
a7a13d06 DC |
834 | if (device >= SNDRV_RAWMIDI_DEVICES) /* next device is -1 */ |
835 | device = SNDRV_RAWMIDI_DEVICES - 1; | |
1a60d4c5 | 836 | mutex_lock(®ister_mutex); |
1da177e4 LT |
837 | device = device < 0 ? 0 : device + 1; |
838 | while (device < SNDRV_RAWMIDI_DEVICES) { | |
f87135f5 | 839 | if (snd_rawmidi_search(card, device)) |
1da177e4 LT |
840 | break; |
841 | device++; | |
842 | } | |
843 | if (device == SNDRV_RAWMIDI_DEVICES) | |
844 | device = -1; | |
1a60d4c5 | 845 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
846 | if (put_user(device, (int __user *)argp)) |
847 | return -EFAULT; | |
848 | return 0; | |
849 | } | |
850 | case SNDRV_CTL_IOCTL_RAWMIDI_PREFER_SUBDEVICE: | |
851 | { | |
852 | int val; | |
853 | ||
854 | if (get_user(val, (int __user *)argp)) | |
855 | return -EFAULT; | |
856 | control->prefer_rawmidi_subdevice = val; | |
857 | return 0; | |
858 | } | |
859 | case SNDRV_CTL_IOCTL_RAWMIDI_INFO: | |
860 | return snd_rawmidi_info_select_user(card, argp); | |
861 | } | |
862 | return -ENOIOCTLCMD; | |
863 | } | |
864 | ||
865 | /** | |
866 | * snd_rawmidi_receive - receive the input data from the device | |
867 | * @substream: the rawmidi substream | |
868 | * @buffer: the buffer pointer | |
869 | * @count: the data size to read | |
870 | * | |
871 | * Reads the data from the internal buffer. | |
872 | * | |
873 | * Returns the size of read data, or a negative error code on failure. | |
874 | */ | |
48c9d417 TI |
875 | int snd_rawmidi_receive(struct snd_rawmidi_substream *substream, |
876 | const unsigned char *buffer, int count) | |
1da177e4 LT |
877 | { |
878 | unsigned long flags; | |
879 | int result = 0, count1; | |
48c9d417 | 880 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 | 881 | |
219df32f TI |
882 | if (!substream->opened) |
883 | return -EBADFD; | |
1da177e4 LT |
884 | if (runtime->buffer == NULL) { |
885 | snd_printd("snd_rawmidi_receive: input is not active!!!\n"); | |
886 | return -EINVAL; | |
887 | } | |
888 | spin_lock_irqsave(&runtime->lock, flags); | |
889 | if (count == 1) { /* special case, faster code */ | |
890 | substream->bytes++; | |
891 | if (runtime->avail < runtime->buffer_size) { | |
892 | runtime->buffer[runtime->hw_ptr++] = buffer[0]; | |
893 | runtime->hw_ptr %= runtime->buffer_size; | |
894 | runtime->avail++; | |
895 | result++; | |
896 | } else { | |
897 | runtime->xruns++; | |
898 | } | |
899 | } else { | |
900 | substream->bytes += count; | |
901 | count1 = runtime->buffer_size - runtime->hw_ptr; | |
902 | if (count1 > count) | |
903 | count1 = count; | |
904 | if (count1 > (int)(runtime->buffer_size - runtime->avail)) | |
905 | count1 = runtime->buffer_size - runtime->avail; | |
906 | memcpy(runtime->buffer + runtime->hw_ptr, buffer, count1); | |
907 | runtime->hw_ptr += count1; | |
908 | runtime->hw_ptr %= runtime->buffer_size; | |
909 | runtime->avail += count1; | |
910 | count -= count1; | |
911 | result += count1; | |
912 | if (count > 0) { | |
913 | buffer += count1; | |
914 | count1 = count; | |
915 | if (count1 > (int)(runtime->buffer_size - runtime->avail)) { | |
916 | count1 = runtime->buffer_size - runtime->avail; | |
917 | runtime->xruns += count - count1; | |
918 | } | |
919 | if (count1 > 0) { | |
920 | memcpy(runtime->buffer, buffer, count1); | |
921 | runtime->hw_ptr = count1; | |
922 | runtime->avail += count1; | |
923 | result += count1; | |
924 | } | |
925 | } | |
926 | } | |
927 | if (result > 0) { | |
928 | if (runtime->event) | |
1f04128a | 929 | tasklet_schedule(&runtime->tasklet); |
1da177e4 LT |
930 | else if (snd_rawmidi_ready(substream)) |
931 | wake_up(&runtime->sleep); | |
932 | } | |
933 | spin_unlock_irqrestore(&runtime->lock, flags); | |
934 | return result; | |
935 | } | |
936 | ||
48c9d417 | 937 | static long snd_rawmidi_kernel_read1(struct snd_rawmidi_substream *substream, |
17596a80 MÅš |
938 | unsigned char __user *userbuf, |
939 | unsigned char *kernelbuf, long count) | |
1da177e4 LT |
940 | { |
941 | unsigned long flags; | |
942 | long result = 0, count1; | |
48c9d417 | 943 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
944 | |
945 | while (count > 0 && runtime->avail) { | |
946 | count1 = runtime->buffer_size - runtime->appl_ptr; | |
947 | if (count1 > count) | |
948 | count1 = count; | |
949 | spin_lock_irqsave(&runtime->lock, flags); | |
950 | if (count1 > (int)runtime->avail) | |
951 | count1 = runtime->avail; | |
17596a80 MÅš |
952 | if (kernelbuf) |
953 | memcpy(kernelbuf + result, runtime->buffer + runtime->appl_ptr, count1); | |
954 | if (userbuf) { | |
1da177e4 | 955 | spin_unlock_irqrestore(&runtime->lock, flags); |
17596a80 | 956 | if (copy_to_user(userbuf + result, |
1da177e4 LT |
957 | runtime->buffer + runtime->appl_ptr, count1)) { |
958 | return result > 0 ? result : -EFAULT; | |
959 | } | |
960 | spin_lock_irqsave(&runtime->lock, flags); | |
961 | } | |
962 | runtime->appl_ptr += count1; | |
963 | runtime->appl_ptr %= runtime->buffer_size; | |
964 | runtime->avail -= count1; | |
965 | spin_unlock_irqrestore(&runtime->lock, flags); | |
966 | result += count1; | |
967 | count -= count1; | |
968 | } | |
969 | return result; | |
970 | } | |
971 | ||
48c9d417 TI |
972 | long snd_rawmidi_kernel_read(struct snd_rawmidi_substream *substream, |
973 | unsigned char *buf, long count) | |
1da177e4 LT |
974 | { |
975 | snd_rawmidi_input_trigger(substream, 1); | |
17596a80 | 976 | return snd_rawmidi_kernel_read1(substream, NULL/*userbuf*/, buf, count); |
1da177e4 LT |
977 | } |
978 | ||
48c9d417 TI |
979 | static ssize_t snd_rawmidi_read(struct file *file, char __user *buf, size_t count, |
980 | loff_t *offset) | |
1da177e4 LT |
981 | { |
982 | long result; | |
983 | int count1; | |
48c9d417 TI |
984 | struct snd_rawmidi_file *rfile; |
985 | struct snd_rawmidi_substream *substream; | |
986 | struct snd_rawmidi_runtime *runtime; | |
1da177e4 LT |
987 | |
988 | rfile = file->private_data; | |
989 | substream = rfile->input; | |
990 | if (substream == NULL) | |
991 | return -EIO; | |
992 | runtime = substream->runtime; | |
993 | snd_rawmidi_input_trigger(substream, 1); | |
994 | result = 0; | |
995 | while (count > 0) { | |
996 | spin_lock_irq(&runtime->lock); | |
997 | while (!snd_rawmidi_ready(substream)) { | |
998 | wait_queue_t wait; | |
999 | if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) { | |
1000 | spin_unlock_irq(&runtime->lock); | |
1001 | return result > 0 ? result : -EAGAIN; | |
1002 | } | |
1003 | init_waitqueue_entry(&wait, current); | |
1004 | add_wait_queue(&runtime->sleep, &wait); | |
1005 | set_current_state(TASK_INTERRUPTIBLE); | |
1006 | spin_unlock_irq(&runtime->lock); | |
1007 | schedule(); | |
1008 | remove_wait_queue(&runtime->sleep, &wait); | |
1009 | if (signal_pending(current)) | |
1010 | return result > 0 ? result : -ERESTARTSYS; | |
1011 | if (!runtime->avail) | |
1012 | return result > 0 ? result : -EIO; | |
1013 | spin_lock_irq(&runtime->lock); | |
1014 | } | |
1015 | spin_unlock_irq(&runtime->lock); | |
4d23359b | 1016 | count1 = snd_rawmidi_kernel_read1(substream, |
17596a80 MÅš |
1017 | (unsigned char __user *)buf, |
1018 | NULL/*kernelbuf*/, | |
1019 | count); | |
1da177e4 LT |
1020 | if (count1 < 0) |
1021 | return result > 0 ? result : count1; | |
1022 | result += count1; | |
1023 | buf += count1; | |
1024 | count -= count1; | |
1025 | } | |
1026 | return result; | |
1027 | } | |
1028 | ||
1029 | /** | |
1030 | * snd_rawmidi_transmit_empty - check whether the output buffer is empty | |
1031 | * @substream: the rawmidi substream | |
1032 | * | |
1033 | * Returns 1 if the internal output buffer is empty, 0 if not. | |
1034 | */ | |
48c9d417 | 1035 | int snd_rawmidi_transmit_empty(struct snd_rawmidi_substream *substream) |
1da177e4 | 1036 | { |
48c9d417 | 1037 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
1038 | int result; |
1039 | unsigned long flags; | |
1040 | ||
1041 | if (runtime->buffer == NULL) { | |
1042 | snd_printd("snd_rawmidi_transmit_empty: output is not active!!!\n"); | |
1043 | return 1; | |
1044 | } | |
1045 | spin_lock_irqsave(&runtime->lock, flags); | |
1046 | result = runtime->avail >= runtime->buffer_size; | |
1047 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1048 | return result; | |
1049 | } | |
1050 | ||
1051 | /** | |
1052 | * snd_rawmidi_transmit_peek - copy data from the internal buffer | |
1053 | * @substream: the rawmidi substream | |
1054 | * @buffer: the buffer pointer | |
1055 | * @count: data size to transfer | |
1056 | * | |
1057 | * Copies data from the internal output buffer to the given buffer. | |
1058 | * | |
1059 | * Call this in the interrupt handler when the midi output is ready, | |
1060 | * and call snd_rawmidi_transmit_ack() after the transmission is | |
1061 | * finished. | |
1062 | * | |
1063 | * Returns the size of copied data, or a negative error code on failure. | |
1064 | */ | |
48c9d417 TI |
1065 | int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream, |
1066 | unsigned char *buffer, int count) | |
1da177e4 LT |
1067 | { |
1068 | unsigned long flags; | |
1069 | int result, count1; | |
48c9d417 | 1070 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
1071 | |
1072 | if (runtime->buffer == NULL) { | |
1073 | snd_printd("snd_rawmidi_transmit_peek: output is not active!!!\n"); | |
1074 | return -EINVAL; | |
1075 | } | |
1076 | result = 0; | |
1077 | spin_lock_irqsave(&runtime->lock, flags); | |
1078 | if (runtime->avail >= runtime->buffer_size) { | |
1079 | /* warning: lowlevel layer MUST trigger down the hardware */ | |
1080 | goto __skip; | |
1081 | } | |
1082 | if (count == 1) { /* special case, faster code */ | |
1083 | *buffer = runtime->buffer[runtime->hw_ptr]; | |
1084 | result++; | |
1085 | } else { | |
1086 | count1 = runtime->buffer_size - runtime->hw_ptr; | |
1087 | if (count1 > count) | |
1088 | count1 = count; | |
1089 | if (count1 > (int)(runtime->buffer_size - runtime->avail)) | |
1090 | count1 = runtime->buffer_size - runtime->avail; | |
1091 | memcpy(buffer, runtime->buffer + runtime->hw_ptr, count1); | |
1092 | count -= count1; | |
1093 | result += count1; | |
1094 | if (count > 0) { | |
1095 | if (count > (int)(runtime->buffer_size - runtime->avail - count1)) | |
1096 | count = runtime->buffer_size - runtime->avail - count1; | |
1097 | memcpy(buffer + count1, runtime->buffer, count); | |
1098 | result += count; | |
1099 | } | |
1100 | } | |
1101 | __skip: | |
1102 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1103 | return result; | |
1104 | } | |
1105 | ||
1106 | /** | |
1107 | * snd_rawmidi_transmit_ack - acknowledge the transmission | |
1108 | * @substream: the rawmidi substream | |
1109 | * @count: the tranferred count | |
1110 | * | |
1111 | * Advances the hardware pointer for the internal output buffer with | |
1112 | * the given size and updates the condition. | |
1113 | * Call after the transmission is finished. | |
1114 | * | |
1115 | * Returns the advanced size if successful, or a negative error code on failure. | |
1116 | */ | |
48c9d417 | 1117 | int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count) |
1da177e4 LT |
1118 | { |
1119 | unsigned long flags; | |
48c9d417 | 1120 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 LT |
1121 | |
1122 | if (runtime->buffer == NULL) { | |
1123 | snd_printd("snd_rawmidi_transmit_ack: output is not active!!!\n"); | |
1124 | return -EINVAL; | |
1125 | } | |
1126 | spin_lock_irqsave(&runtime->lock, flags); | |
7eaa943c | 1127 | snd_BUG_ON(runtime->avail + count > runtime->buffer_size); |
1da177e4 LT |
1128 | runtime->hw_ptr += count; |
1129 | runtime->hw_ptr %= runtime->buffer_size; | |
1130 | runtime->avail += count; | |
1131 | substream->bytes += count; | |
1132 | if (count > 0) { | |
1133 | if (runtime->drain || snd_rawmidi_ready(substream)) | |
1134 | wake_up(&runtime->sleep); | |
1135 | } | |
1136 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1137 | return count; | |
1138 | } | |
1139 | ||
1140 | /** | |
1141 | * snd_rawmidi_transmit - copy from the buffer to the device | |
1142 | * @substream: the rawmidi substream | |
df8db936 | 1143 | * @buffer: the buffer pointer |
1da177e4 LT |
1144 | * @count: the data size to transfer |
1145 | * | |
1146 | * Copies data from the buffer to the device and advances the pointer. | |
1147 | * | |
1148 | * Returns the copied size if successful, or a negative error code on failure. | |
1149 | */ | |
48c9d417 TI |
1150 | int snd_rawmidi_transmit(struct snd_rawmidi_substream *substream, |
1151 | unsigned char *buffer, int count) | |
1da177e4 | 1152 | { |
219df32f TI |
1153 | if (!substream->opened) |
1154 | return -EBADFD; | |
1da177e4 LT |
1155 | count = snd_rawmidi_transmit_peek(substream, buffer, count); |
1156 | if (count < 0) | |
1157 | return count; | |
1158 | return snd_rawmidi_transmit_ack(substream, count); | |
1159 | } | |
1160 | ||
48c9d417 | 1161 | static long snd_rawmidi_kernel_write1(struct snd_rawmidi_substream *substream, |
17596a80 MÅš |
1162 | const unsigned char __user *userbuf, |
1163 | const unsigned char *kernelbuf, | |
1164 | long count) | |
1da177e4 LT |
1165 | { |
1166 | unsigned long flags; | |
1167 | long count1, result; | |
48c9d417 | 1168 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1da177e4 | 1169 | |
7eaa943c TI |
1170 | if (snd_BUG_ON(!kernelbuf && !userbuf)) |
1171 | return -EINVAL; | |
1172 | if (snd_BUG_ON(!runtime->buffer)) | |
1173 | return -EINVAL; | |
1da177e4 LT |
1174 | |
1175 | result = 0; | |
1176 | spin_lock_irqsave(&runtime->lock, flags); | |
1177 | if (substream->append) { | |
1178 | if ((long)runtime->avail < count) { | |
1179 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1180 | return -EAGAIN; | |
1181 | } | |
1182 | } | |
1183 | while (count > 0 && runtime->avail > 0) { | |
1184 | count1 = runtime->buffer_size - runtime->appl_ptr; | |
1185 | if (count1 > count) | |
1186 | count1 = count; | |
1187 | if (count1 > (long)runtime->avail) | |
1188 | count1 = runtime->avail; | |
17596a80 MÅš |
1189 | if (kernelbuf) |
1190 | memcpy(runtime->buffer + runtime->appl_ptr, | |
1191 | kernelbuf + result, count1); | |
1192 | else if (userbuf) { | |
1da177e4 LT |
1193 | spin_unlock_irqrestore(&runtime->lock, flags); |
1194 | if (copy_from_user(runtime->buffer + runtime->appl_ptr, | |
17596a80 | 1195 | userbuf + result, count1)) { |
1da177e4 LT |
1196 | spin_lock_irqsave(&runtime->lock, flags); |
1197 | result = result > 0 ? result : -EFAULT; | |
1198 | goto __end; | |
1199 | } | |
1200 | spin_lock_irqsave(&runtime->lock, flags); | |
1201 | } | |
1202 | runtime->appl_ptr += count1; | |
1203 | runtime->appl_ptr %= runtime->buffer_size; | |
1204 | runtime->avail -= count1; | |
1205 | result += count1; | |
1da177e4 LT |
1206 | count -= count1; |
1207 | } | |
1208 | __end: | |
1209 | count1 = runtime->avail < runtime->buffer_size; | |
1210 | spin_unlock_irqrestore(&runtime->lock, flags); | |
1211 | if (count1) | |
1212 | snd_rawmidi_output_trigger(substream, 1); | |
1213 | return result; | |
1214 | } | |
1215 | ||
48c9d417 TI |
1216 | long snd_rawmidi_kernel_write(struct snd_rawmidi_substream *substream, |
1217 | const unsigned char *buf, long count) | |
1da177e4 | 1218 | { |
17596a80 | 1219 | return snd_rawmidi_kernel_write1(substream, NULL, buf, count); |
1da177e4 LT |
1220 | } |
1221 | ||
48c9d417 TI |
1222 | static ssize_t snd_rawmidi_write(struct file *file, const char __user *buf, |
1223 | size_t count, loff_t *offset) | |
1da177e4 LT |
1224 | { |
1225 | long result, timeout; | |
1226 | int count1; | |
48c9d417 TI |
1227 | struct snd_rawmidi_file *rfile; |
1228 | struct snd_rawmidi_runtime *runtime; | |
1229 | struct snd_rawmidi_substream *substream; | |
1da177e4 LT |
1230 | |
1231 | rfile = file->private_data; | |
1232 | substream = rfile->output; | |
1233 | runtime = substream->runtime; | |
1234 | /* we cannot put an atomic message to our buffer */ | |
1235 | if (substream->append && count > runtime->buffer_size) | |
1236 | return -EIO; | |
1237 | result = 0; | |
1238 | while (count > 0) { | |
1239 | spin_lock_irq(&runtime->lock); | |
1240 | while (!snd_rawmidi_ready_append(substream, count)) { | |
1241 | wait_queue_t wait; | |
1242 | if (file->f_flags & O_NONBLOCK) { | |
1243 | spin_unlock_irq(&runtime->lock); | |
1244 | return result > 0 ? result : -EAGAIN; | |
1245 | } | |
1246 | init_waitqueue_entry(&wait, current); | |
1247 | add_wait_queue(&runtime->sleep, &wait); | |
1248 | set_current_state(TASK_INTERRUPTIBLE); | |
1249 | spin_unlock_irq(&runtime->lock); | |
1250 | timeout = schedule_timeout(30 * HZ); | |
1251 | remove_wait_queue(&runtime->sleep, &wait); | |
1252 | if (signal_pending(current)) | |
1253 | return result > 0 ? result : -ERESTARTSYS; | |
1254 | if (!runtime->avail && !timeout) | |
1255 | return result > 0 ? result : -EIO; | |
1256 | spin_lock_irq(&runtime->lock); | |
1257 | } | |
1258 | spin_unlock_irq(&runtime->lock); | |
17596a80 | 1259 | count1 = snd_rawmidi_kernel_write1(substream, buf, NULL, count); |
1da177e4 LT |
1260 | if (count1 < 0) |
1261 | return result > 0 ? result : count1; | |
1262 | result += count1; | |
1263 | buf += count1; | |
1264 | if ((size_t)count1 < count && (file->f_flags & O_NONBLOCK)) | |
1265 | break; | |
1266 | count -= count1; | |
1267 | } | |
6b2f3d1f | 1268 | if (file->f_flags & O_DSYNC) { |
1da177e4 LT |
1269 | spin_lock_irq(&runtime->lock); |
1270 | while (runtime->avail != runtime->buffer_size) { | |
1271 | wait_queue_t wait; | |
1272 | unsigned int last_avail = runtime->avail; | |
1273 | init_waitqueue_entry(&wait, current); | |
1274 | add_wait_queue(&runtime->sleep, &wait); | |
1275 | set_current_state(TASK_INTERRUPTIBLE); | |
1276 | spin_unlock_irq(&runtime->lock); | |
1277 | timeout = schedule_timeout(30 * HZ); | |
1278 | remove_wait_queue(&runtime->sleep, &wait); | |
1279 | if (signal_pending(current)) | |
1280 | return result > 0 ? result : -ERESTARTSYS; | |
1281 | if (runtime->avail == last_avail && !timeout) | |
1282 | return result > 0 ? result : -EIO; | |
1283 | spin_lock_irq(&runtime->lock); | |
1284 | } | |
1285 | spin_unlock_irq(&runtime->lock); | |
1286 | } | |
1287 | return result; | |
1288 | } | |
1289 | ||
1290 | static unsigned int snd_rawmidi_poll(struct file *file, poll_table * wait) | |
1291 | { | |
48c9d417 TI |
1292 | struct snd_rawmidi_file *rfile; |
1293 | struct snd_rawmidi_runtime *runtime; | |
1da177e4 LT |
1294 | unsigned int mask; |
1295 | ||
1296 | rfile = file->private_data; | |
1297 | if (rfile->input != NULL) { | |
1298 | runtime = rfile->input->runtime; | |
1299 | snd_rawmidi_input_trigger(rfile->input, 1); | |
1300 | poll_wait(file, &runtime->sleep, wait); | |
1301 | } | |
1302 | if (rfile->output != NULL) { | |
1303 | runtime = rfile->output->runtime; | |
1304 | poll_wait(file, &runtime->sleep, wait); | |
1305 | } | |
1306 | mask = 0; | |
1307 | if (rfile->input != NULL) { | |
1308 | if (snd_rawmidi_ready(rfile->input)) | |
1309 | mask |= POLLIN | POLLRDNORM; | |
1310 | } | |
1311 | if (rfile->output != NULL) { | |
1312 | if (snd_rawmidi_ready(rfile->output)) | |
1313 | mask |= POLLOUT | POLLWRNORM; | |
1314 | } | |
1315 | return mask; | |
1316 | } | |
1317 | ||
1318 | /* | |
1319 | */ | |
1320 | #ifdef CONFIG_COMPAT | |
1321 | #include "rawmidi_compat.c" | |
1322 | #else | |
1323 | #define snd_rawmidi_ioctl_compat NULL | |
1324 | #endif | |
1325 | ||
1326 | /* | |
1327 | ||
1328 | */ | |
1329 | ||
48c9d417 TI |
1330 | static void snd_rawmidi_proc_info_read(struct snd_info_entry *entry, |
1331 | struct snd_info_buffer *buffer) | |
1da177e4 | 1332 | { |
48c9d417 TI |
1333 | struct snd_rawmidi *rmidi; |
1334 | struct snd_rawmidi_substream *substream; | |
1335 | struct snd_rawmidi_runtime *runtime; | |
1da177e4 LT |
1336 | |
1337 | rmidi = entry->private_data; | |
1338 | snd_iprintf(buffer, "%s\n\n", rmidi->name); | |
1a60d4c5 | 1339 | mutex_lock(&rmidi->open_mutex); |
1da177e4 | 1340 | if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_OUTPUT) { |
9244b2c3 JB |
1341 | list_for_each_entry(substream, |
1342 | &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams, | |
1343 | list) { | |
1da177e4 LT |
1344 | snd_iprintf(buffer, |
1345 | "Output %d\n" | |
1346 | " Tx bytes : %lu\n", | |
1347 | substream->number, | |
1348 | (unsigned long) substream->bytes); | |
1349 | if (substream->opened) { | |
7584af10 CL |
1350 | snd_iprintf(buffer, |
1351 | " Owner PID : %d\n", | |
1352 | pid_vnr(substream->pid)); | |
1da177e4 LT |
1353 | runtime = substream->runtime; |
1354 | snd_iprintf(buffer, | |
1355 | " Mode : %s\n" | |
1356 | " Buffer size : %lu\n" | |
1357 | " Avail : %lu\n", | |
1358 | runtime->oss ? "OSS compatible" : "native", | |
1359 | (unsigned long) runtime->buffer_size, | |
1360 | (unsigned long) runtime->avail); | |
1361 | } | |
1362 | } | |
1363 | } | |
1364 | if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_INPUT) { | |
9244b2c3 JB |
1365 | list_for_each_entry(substream, |
1366 | &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams, | |
1367 | list) { | |
1da177e4 LT |
1368 | snd_iprintf(buffer, |
1369 | "Input %d\n" | |
1370 | " Rx bytes : %lu\n", | |
1371 | substream->number, | |
1372 | (unsigned long) substream->bytes); | |
1373 | if (substream->opened) { | |
7584af10 CL |
1374 | snd_iprintf(buffer, |
1375 | " Owner PID : %d\n", | |
1376 | pid_vnr(substream->pid)); | |
1da177e4 LT |
1377 | runtime = substream->runtime; |
1378 | snd_iprintf(buffer, | |
1379 | " Buffer size : %lu\n" | |
1380 | " Avail : %lu\n" | |
1381 | " Overruns : %lu\n", | |
1382 | (unsigned long) runtime->buffer_size, | |
1383 | (unsigned long) runtime->avail, | |
1384 | (unsigned long) runtime->xruns); | |
1385 | } | |
1386 | } | |
1387 | } | |
1a60d4c5 | 1388 | mutex_unlock(&rmidi->open_mutex); |
1da177e4 LT |
1389 | } |
1390 | ||
1391 | /* | |
1392 | * Register functions | |
1393 | */ | |
1394 | ||
9c2e08c5 | 1395 | static const struct file_operations snd_rawmidi_f_ops = |
1da177e4 LT |
1396 | { |
1397 | .owner = THIS_MODULE, | |
1398 | .read = snd_rawmidi_read, | |
1399 | .write = snd_rawmidi_write, | |
1400 | .open = snd_rawmidi_open, | |
1401 | .release = snd_rawmidi_release, | |
02f4865f | 1402 | .llseek = no_llseek, |
1da177e4 LT |
1403 | .poll = snd_rawmidi_poll, |
1404 | .unlocked_ioctl = snd_rawmidi_ioctl, | |
1405 | .compat_ioctl = snd_rawmidi_ioctl_compat, | |
1406 | }; | |
1407 | ||
48c9d417 TI |
1408 | static int snd_rawmidi_alloc_substreams(struct snd_rawmidi *rmidi, |
1409 | struct snd_rawmidi_str *stream, | |
1da177e4 LT |
1410 | int direction, |
1411 | int count) | |
1412 | { | |
48c9d417 | 1413 | struct snd_rawmidi_substream *substream; |
1da177e4 LT |
1414 | int idx; |
1415 | ||
1da177e4 | 1416 | for (idx = 0; idx < count; idx++) { |
ca2c0966 | 1417 | substream = kzalloc(sizeof(*substream), GFP_KERNEL); |
73e77ba0 TI |
1418 | if (substream == NULL) { |
1419 | snd_printk(KERN_ERR "rawmidi: cannot allocate substream\n"); | |
1da177e4 | 1420 | return -ENOMEM; |
73e77ba0 | 1421 | } |
1da177e4 LT |
1422 | substream->stream = direction; |
1423 | substream->number = idx; | |
1424 | substream->rmidi = rmidi; | |
1425 | substream->pstr = stream; | |
1426 | list_add_tail(&substream->list, &stream->substreams); | |
1427 | stream->substream_count++; | |
1428 | } | |
1429 | return 0; | |
1430 | } | |
1431 | ||
1432 | /** | |
1433 | * snd_rawmidi_new - create a rawmidi instance | |
1434 | * @card: the card instance | |
1435 | * @id: the id string | |
1436 | * @device: the device index | |
1437 | * @output_count: the number of output streams | |
1438 | * @input_count: the number of input streams | |
1439 | * @rrawmidi: the pointer to store the new rawmidi instance | |
1440 | * | |
1441 | * Creates a new rawmidi instance. | |
1442 | * Use snd_rawmidi_set_ops() to set the operators to the new instance. | |
1443 | * | |
1444 | * Returns zero if successful, or a negative error code on failure. | |
1445 | */ | |
48c9d417 | 1446 | int snd_rawmidi_new(struct snd_card *card, char *id, int device, |
1da177e4 | 1447 | int output_count, int input_count, |
48c9d417 | 1448 | struct snd_rawmidi ** rrawmidi) |
1da177e4 | 1449 | { |
48c9d417 | 1450 | struct snd_rawmidi *rmidi; |
1da177e4 | 1451 | int err; |
48c9d417 | 1452 | static struct snd_device_ops ops = { |
1da177e4 LT |
1453 | .dev_free = snd_rawmidi_dev_free, |
1454 | .dev_register = snd_rawmidi_dev_register, | |
1455 | .dev_disconnect = snd_rawmidi_dev_disconnect, | |
1da177e4 LT |
1456 | }; |
1457 | ||
7eaa943c TI |
1458 | if (snd_BUG_ON(!card)) |
1459 | return -ENXIO; | |
1460 | if (rrawmidi) | |
1461 | *rrawmidi = NULL; | |
ca2c0966 | 1462 | rmidi = kzalloc(sizeof(*rmidi), GFP_KERNEL); |
73e77ba0 TI |
1463 | if (rmidi == NULL) { |
1464 | snd_printk(KERN_ERR "rawmidi: cannot allocate\n"); | |
1da177e4 | 1465 | return -ENOMEM; |
73e77ba0 | 1466 | } |
1da177e4 LT |
1467 | rmidi->card = card; |
1468 | rmidi->device = device; | |
1a60d4c5 | 1469 | mutex_init(&rmidi->open_mutex); |
1da177e4 | 1470 | init_waitqueue_head(&rmidi->open_wait); |
c13893d7 AM |
1471 | INIT_LIST_HEAD(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams); |
1472 | INIT_LIST_HEAD(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams); | |
1473 | ||
1da177e4 LT |
1474 | if (id != NULL) |
1475 | strlcpy(rmidi->id, id, sizeof(rmidi->id)); | |
73e77ba0 TI |
1476 | if ((err = snd_rawmidi_alloc_substreams(rmidi, |
1477 | &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT], | |
1478 | SNDRV_RAWMIDI_STREAM_INPUT, | |
1479 | input_count)) < 0) { | |
1da177e4 LT |
1480 | snd_rawmidi_free(rmidi); |
1481 | return err; | |
1482 | } | |
73e77ba0 TI |
1483 | if ((err = snd_rawmidi_alloc_substreams(rmidi, |
1484 | &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT], | |
1485 | SNDRV_RAWMIDI_STREAM_OUTPUT, | |
1486 | output_count)) < 0) { | |
1da177e4 LT |
1487 | snd_rawmidi_free(rmidi); |
1488 | return err; | |
1489 | } | |
1490 | if ((err = snd_device_new(card, SNDRV_DEV_RAWMIDI, rmidi, &ops)) < 0) { | |
1491 | snd_rawmidi_free(rmidi); | |
1492 | return err; | |
1493 | } | |
7eaa943c TI |
1494 | if (rrawmidi) |
1495 | *rrawmidi = rmidi; | |
1da177e4 LT |
1496 | return 0; |
1497 | } | |
1498 | ||
48c9d417 | 1499 | static void snd_rawmidi_free_substreams(struct snd_rawmidi_str *stream) |
1da177e4 | 1500 | { |
48c9d417 | 1501 | struct snd_rawmidi_substream *substream; |
1da177e4 LT |
1502 | |
1503 | while (!list_empty(&stream->substreams)) { | |
48c9d417 | 1504 | substream = list_entry(stream->substreams.next, struct snd_rawmidi_substream, list); |
1da177e4 LT |
1505 | list_del(&substream->list); |
1506 | kfree(substream); | |
1507 | } | |
1508 | } | |
1509 | ||
48c9d417 | 1510 | static int snd_rawmidi_free(struct snd_rawmidi *rmidi) |
1da177e4 | 1511 | { |
7eaa943c TI |
1512 | if (!rmidi) |
1513 | return 0; | |
c461482c TI |
1514 | |
1515 | snd_info_free_entry(rmidi->proc_entry); | |
1516 | rmidi->proc_entry = NULL; | |
1517 | mutex_lock(®ister_mutex); | |
1518 | if (rmidi->ops && rmidi->ops->dev_unregister) | |
1519 | rmidi->ops->dev_unregister(rmidi); | |
1520 | mutex_unlock(®ister_mutex); | |
1521 | ||
1da177e4 LT |
1522 | snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]); |
1523 | snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]); | |
1524 | if (rmidi->private_free) | |
1525 | rmidi->private_free(rmidi); | |
1526 | kfree(rmidi); | |
1527 | return 0; | |
1528 | } | |
1529 | ||
48c9d417 | 1530 | static int snd_rawmidi_dev_free(struct snd_device *device) |
1da177e4 | 1531 | { |
48c9d417 | 1532 | struct snd_rawmidi *rmidi = device->device_data; |
1da177e4 LT |
1533 | return snd_rawmidi_free(rmidi); |
1534 | } | |
1535 | ||
1536 | #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE)) | |
48c9d417 | 1537 | static void snd_rawmidi_dev_seq_free(struct snd_seq_device *device) |
1da177e4 | 1538 | { |
48c9d417 | 1539 | struct snd_rawmidi *rmidi = device->private_data; |
1da177e4 LT |
1540 | rmidi->seq_dev = NULL; |
1541 | } | |
1542 | #endif | |
1543 | ||
48c9d417 | 1544 | static int snd_rawmidi_dev_register(struct snd_device *device) |
1da177e4 | 1545 | { |
f87135f5 | 1546 | int err; |
48c9d417 | 1547 | struct snd_info_entry *entry; |
1da177e4 | 1548 | char name[16]; |
48c9d417 | 1549 | struct snd_rawmidi *rmidi = device->device_data; |
1da177e4 LT |
1550 | |
1551 | if (rmidi->device >= SNDRV_RAWMIDI_DEVICES) | |
1552 | return -ENOMEM; | |
1a60d4c5 | 1553 | mutex_lock(®ister_mutex); |
f87135f5 | 1554 | if (snd_rawmidi_search(rmidi->card, rmidi->device)) { |
1a60d4c5 | 1555 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1556 | return -EBUSY; |
1557 | } | |
f87135f5 | 1558 | list_add_tail(&rmidi->list, &snd_rawmidi_devices); |
1da177e4 LT |
1559 | sprintf(name, "midiC%iD%i", rmidi->card->number, rmidi->device); |
1560 | if ((err = snd_register_device(SNDRV_DEVICE_TYPE_RAWMIDI, | |
1561 | rmidi->card, rmidi->device, | |
f87135f5 | 1562 | &snd_rawmidi_f_ops, rmidi, name)) < 0) { |
1da177e4 | 1563 | snd_printk(KERN_ERR "unable to register rawmidi device %i:%i\n", rmidi->card->number, rmidi->device); |
f87135f5 | 1564 | list_del(&rmidi->list); |
1a60d4c5 | 1565 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1566 | return err; |
1567 | } | |
1568 | if (rmidi->ops && rmidi->ops->dev_register && | |
1569 | (err = rmidi->ops->dev_register(rmidi)) < 0) { | |
1570 | snd_unregister_device(SNDRV_DEVICE_TYPE_RAWMIDI, rmidi->card, rmidi->device); | |
f87135f5 | 1571 | list_del(&rmidi->list); |
1a60d4c5 | 1572 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1573 | return err; |
1574 | } | |
1575 | #ifdef CONFIG_SND_OSSEMUL | |
1576 | rmidi->ossreg = 0; | |
1577 | if ((int)rmidi->device == midi_map[rmidi->card->number]) { | |
1578 | if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, | |
f87135f5 CL |
1579 | rmidi->card, 0, &snd_rawmidi_f_ops, |
1580 | rmidi, name) < 0) { | |
1da177e4 LT |
1581 | snd_printk(KERN_ERR "unable to register OSS rawmidi device %i:%i\n", rmidi->card->number, 0); |
1582 | } else { | |
1583 | rmidi->ossreg++; | |
1584 | #ifdef SNDRV_OSS_INFO_DEV_MIDI | |
1585 | snd_oss_info_register(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number, rmidi->name); | |
1586 | #endif | |
1587 | } | |
1588 | } | |
1589 | if ((int)rmidi->device == amidi_map[rmidi->card->number]) { | |
1590 | if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, | |
f87135f5 CL |
1591 | rmidi->card, 1, &snd_rawmidi_f_ops, |
1592 | rmidi, name) < 0) { | |
1da177e4 LT |
1593 | snd_printk(KERN_ERR "unable to register OSS rawmidi device %i:%i\n", rmidi->card->number, 1); |
1594 | } else { | |
1595 | rmidi->ossreg++; | |
1596 | } | |
1597 | } | |
1598 | #endif /* CONFIG_SND_OSSEMUL */ | |
1a60d4c5 | 1599 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1600 | sprintf(name, "midi%d", rmidi->device); |
1601 | entry = snd_info_create_card_entry(rmidi->card, name, rmidi->card->proc_root); | |
1602 | if (entry) { | |
1603 | entry->private_data = rmidi; | |
1da177e4 LT |
1604 | entry->c.text.read = snd_rawmidi_proc_info_read; |
1605 | if (snd_info_register(entry) < 0) { | |
1606 | snd_info_free_entry(entry); | |
1607 | entry = NULL; | |
1608 | } | |
1609 | } | |
1610 | rmidi->proc_entry = entry; | |
1611 | #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE)) | |
1612 | if (!rmidi->ops || !rmidi->ops->dev_register) { /* own registration mechanism */ | |
1613 | if (snd_seq_device_new(rmidi->card, rmidi->device, SNDRV_SEQ_DEV_ID_MIDISYNTH, 0, &rmidi->seq_dev) >= 0) { | |
1614 | rmidi->seq_dev->private_data = rmidi; | |
1615 | rmidi->seq_dev->private_free = snd_rawmidi_dev_seq_free; | |
1616 | sprintf(rmidi->seq_dev->name, "MIDI %d-%d", rmidi->card->number, rmidi->device); | |
1617 | snd_device_register(rmidi->card, rmidi->seq_dev); | |
1618 | } | |
1619 | } | |
1620 | #endif | |
1621 | return 0; | |
1622 | } | |
1623 | ||
48c9d417 | 1624 | static int snd_rawmidi_dev_disconnect(struct snd_device *device) |
1da177e4 | 1625 | { |
48c9d417 | 1626 | struct snd_rawmidi *rmidi = device->device_data; |
1da177e4 | 1627 | |
1a60d4c5 | 1628 | mutex_lock(®ister_mutex); |
f87135f5 | 1629 | list_del_init(&rmidi->list); |
1da177e4 LT |
1630 | #ifdef CONFIG_SND_OSSEMUL |
1631 | if (rmidi->ossreg) { | |
1632 | if ((int)rmidi->device == midi_map[rmidi->card->number]) { | |
1633 | snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 0); | |
1634 | #ifdef SNDRV_OSS_INFO_DEV_MIDI | |
1635 | snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number); | |
1636 | #endif | |
1637 | } | |
1638 | if ((int)rmidi->device == amidi_map[rmidi->card->number]) | |
1639 | snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 1); | |
1640 | rmidi->ossreg = 0; | |
1641 | } | |
1642 | #endif /* CONFIG_SND_OSSEMUL */ | |
1da177e4 | 1643 | snd_unregister_device(SNDRV_DEVICE_TYPE_RAWMIDI, rmidi->card, rmidi->device); |
1a60d4c5 | 1644 | mutex_unlock(®ister_mutex); |
c461482c | 1645 | return 0; |
1da177e4 LT |
1646 | } |
1647 | ||
1648 | /** | |
1649 | * snd_rawmidi_set_ops - set the rawmidi operators | |
1650 | * @rmidi: the rawmidi instance | |
1651 | * @stream: the stream direction, SNDRV_RAWMIDI_STREAM_XXX | |
1652 | * @ops: the operator table | |
1653 | * | |
1654 | * Sets the rawmidi operators for the given stream direction. | |
1655 | */ | |
48c9d417 TI |
1656 | void snd_rawmidi_set_ops(struct snd_rawmidi *rmidi, int stream, |
1657 | struct snd_rawmidi_ops *ops) | |
1da177e4 | 1658 | { |
48c9d417 | 1659 | struct snd_rawmidi_substream *substream; |
1da177e4 | 1660 | |
9244b2c3 | 1661 | list_for_each_entry(substream, &rmidi->streams[stream].substreams, list) |
1da177e4 | 1662 | substream->ops = ops; |
1da177e4 LT |
1663 | } |
1664 | ||
1665 | /* | |
1666 | * ENTRY functions | |
1667 | */ | |
1668 | ||
1669 | static int __init alsa_rawmidi_init(void) | |
1670 | { | |
1671 | ||
1672 | snd_ctl_register_ioctl(snd_rawmidi_control_ioctl); | |
1673 | snd_ctl_register_ioctl_compat(snd_rawmidi_control_ioctl); | |
1674 | #ifdef CONFIG_SND_OSSEMUL | |
1675 | { int i; | |
1676 | /* check device map table */ | |
1677 | for (i = 0; i < SNDRV_CARDS; i++) { | |
1678 | if (midi_map[i] < 0 || midi_map[i] >= SNDRV_RAWMIDI_DEVICES) { | |
1679 | snd_printk(KERN_ERR "invalid midi_map[%d] = %d\n", i, midi_map[i]); | |
1680 | midi_map[i] = 0; | |
1681 | } | |
1682 | if (amidi_map[i] < 0 || amidi_map[i] >= SNDRV_RAWMIDI_DEVICES) { | |
1683 | snd_printk(KERN_ERR "invalid amidi_map[%d] = %d\n", i, amidi_map[i]); | |
1684 | amidi_map[i] = 1; | |
1685 | } | |
1686 | } | |
1687 | } | |
1688 | #endif /* CONFIG_SND_OSSEMUL */ | |
1689 | return 0; | |
1690 | } | |
1691 | ||
1692 | static void __exit alsa_rawmidi_exit(void) | |
1693 | { | |
1694 | snd_ctl_unregister_ioctl(snd_rawmidi_control_ioctl); | |
1695 | snd_ctl_unregister_ioctl_compat(snd_rawmidi_control_ioctl); | |
1696 | } | |
1697 | ||
1698 | module_init(alsa_rawmidi_init) | |
1699 | module_exit(alsa_rawmidi_exit) | |
1700 | ||
1701 | EXPORT_SYMBOL(snd_rawmidi_output_params); | |
1702 | EXPORT_SYMBOL(snd_rawmidi_input_params); | |
1703 | EXPORT_SYMBOL(snd_rawmidi_drop_output); | |
1704 | EXPORT_SYMBOL(snd_rawmidi_drain_output); | |
1705 | EXPORT_SYMBOL(snd_rawmidi_drain_input); | |
1706 | EXPORT_SYMBOL(snd_rawmidi_receive); | |
1707 | EXPORT_SYMBOL(snd_rawmidi_transmit_empty); | |
1708 | EXPORT_SYMBOL(snd_rawmidi_transmit_peek); | |
1709 | EXPORT_SYMBOL(snd_rawmidi_transmit_ack); | |
1710 | EXPORT_SYMBOL(snd_rawmidi_transmit); | |
1711 | EXPORT_SYMBOL(snd_rawmidi_new); | |
1712 | EXPORT_SYMBOL(snd_rawmidi_set_ops); | |
1da177e4 LT |
1713 | EXPORT_SYMBOL(snd_rawmidi_info_select); |
1714 | EXPORT_SYMBOL(snd_rawmidi_kernel_open); | |
1715 | EXPORT_SYMBOL(snd_rawmidi_kernel_release); | |
1716 | EXPORT_SYMBOL(snd_rawmidi_kernel_read); | |
1717 | EXPORT_SYMBOL(snd_rawmidi_kernel_write); |